Core.addWeighted
Core.vconcat
Core.hconcat
Imgproc.resize
Core.copyMakeBorder
Mat.submat
Mat.copyTo
Imgproc.cvtColor
Imgproc.threshold
Core.bitwise_and
Core.merge
工具类见 http://www.gaohaiyan.com/3229.html
本例完整代码：
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import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.awt.image.BufferedImage; import java.util.ArrayList; import java.util.List; import javax.swing.ButtonGroup; import javax.swing.ImageIcon; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JRadioButton; import javax.swing.JSlider; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener; import org.opencv.core.Core; import org.opencv.core.Mat; import org.opencv.core.Rect; import org.opencv.imgcodecs.Imgcodecs; import org.opencv.imgproc.Imgproc; /** * 图片透明叠加、边框、拷贝叠加 */ public class Merge extends JFrame { private JLabel imageView; private boolean isConcat = false; private boolean isBorder = false; private double alpha = 0; private double beta = 0; private double gamma = 0; private int concat = 1; private int forwad = 0; private float border = 0; private Mat srcMat1; private Mat srcMat2; private Mat srcMat3; public Merge(String img1, String img2, String img3) { JLabel alphaLabel = new JLabel("alpha:" + alpha); alphaLabel.setBounds(15, 10, 120, 25); JSlider alphaBar = new JSlider(0, 20); alphaBar.setValue((int) alpha); alphaBar.setBounds(80, 10, 150, 25); alphaBar.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { alpha = alphaBar.getValue() * 1.0d; alphaLabel.setText("alpha:" + alpha); setPic(); } }); JLabel betaLabel = new JLabel("beta:" + beta); betaLabel.setBounds(15, 30, 120, 25); JSlider betaBar = new JSlider(0, 20); betaBar.setValue((int) beta); betaBar.setBounds(80, 30, 150, 25); betaBar.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { beta = betaBar.getValue() * 1.0d; betaLabel.setText("beta:" + beta); setPic(); } }); JLabel gammaLabel = new JLabel("gamma:" + gamma); gammaLabel.setBounds(15, 50, 120, 25); JSlider gammaBar = new JSlider(0, 100); gammaBar.setValue((int) gamma); gammaBar.setBounds(80, 50, 150, 25); gammaBar.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { gamma = gammaBar.getValue(); gammaLabel.setText("gamma:" + gamma); setPic(); } }); JCheckBox concatBtn = new JCheckBox("拼接"); concatBtn.setBounds(240, 10, 60, 25); concatBtn.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { isConcat = !isConcat; concatPic(); } }); JLabel concatLabel = new JLabel("数量:" + concat); concatLabel.setBounds(300, 10, 40, 25); JSlider concatBar = new JSlider(1, 5); concatBar.setValue(1); concatBar.setBounds(340, 10, 120, 25); concatBar.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { concat = concatBar.getValue(); concatLabel.setText("数量:" + concat); concatPic(); } }); JRadioButton hBtn = new JRadioButton("水平"); hBtn.setBounds(460, 10, 60, 25); hBtn.setSelected(true); hBtn.addItemListener(new ItemListener() { @Override public void itemStateChanged(ItemEvent e) { forwad = 0; } }); JRadioButton vBtn = new JRadioButton("垂直"); vBtn.setBounds(520, 10, 60, 25); vBtn.addItemListener(new ItemListener() { @Override public void itemStateChanged(ItemEvent e) { forwad = 1; } }); ButtonGroup group = new ButtonGroup(); group.add(hBtn); group.add(vBtn); JCheckBox borderBtn = new JCheckBox("边框"); borderBtn.setBounds(10, 80, 60, 25); borderBtn.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { isBorder = !isBorder; borderPic(); } }); JLabel borderLabel = new JLabel("宽度:" + 0); borderLabel.setBounds(80, 80, 60, 25); JSlider borderBar = new JSlider(0, 5); borderBar.setValue(0); borderBar.setBounds(140, 80, 120, 25); borderBar.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { border = borderBar.getValue() / 100f; borderLabel.setText("宽度:" + border); borderPic(); } }); JCheckBox compBtn = new JCheckBox("叠加"); compBtn.setBounds(10, 110, 60, 25); compBtn.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { compPic(compBtn.isSelected()); } }); JCheckBox irregularBtn = new JCheckBox("不规则叠加"); irregularBtn.setBounds(80, 110, 140, 25); irregularBtn.addChangeListener(new ChangeListener() { @Override public void stateChanged(ChangeEvent e) { irregularPic(irregularBtn.isSelected()); } }); srcMat1 = Imgcodecs.imread(img1);//, Imgcodecs.CV_LOAD_IMAGE_COLOR); srcMat2 = Imgcodecs.imread(img2); srcMat3 = Imgcodecs.imread(img3);//, Imgcodecs.CV_LOAD_IMAGE_COLOR); int width = srcMat1.width(); int height = srcMat1.height(); imageView = new JLabel(""); imageView.setBounds(40, 120, width + 50, height + 50); this.setTitle("图片透明叠加、边框、拷贝叠加"); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setSize(width + 100, height + 250); this.getContentPane().setLayout(null); this.getContentPane().add(alphaLabel); this.getContentPane().add(alphaBar); this.getContentPane().add(betaLabel); this.getContentPane().add(betaBar); this.getContentPane().add(gammaLabel); this.getContentPane().add(gammaBar); this.getContentPane().add(concatBtn); this.getContentPane().add(concatLabel); this.getContentPane().add(concatBar); this.getContentPane().add(hBtn); this.getContentPane().add(vBtn); this.getContentPane().add(borderBtn); this.getContentPane().add(borderLabel); this.getContentPane().add(borderBar); this.getContentPane().add(compBtn); this.getContentPane().add(irregularBtn); this.getContentPane().add(imageView); setIcon(srcMat1); } private void setPic() { Mat mat = new Mat(srcMat1.rows(), srcMat1.cols(), srcMat1.type()); // Mat src1, double alpha, Mat src2, double beta, double gamma, Mat dst Core.addWeighted(srcMat1, alpha / 10, srcMat2, beta / 10, gamma, mat); // 图片叠加 src1*alpha+src2*beta+gamma setIcon(mat); } private void concatPic() { int rows = srcMat1.rows(); int cols = srcMat1.cols(); int ir = (int) (rows / concat); // 缩小 int ic = (int) (cols / concat); Mat concatMat = new Mat(ir, ic, srcMat1.type()); Imgproc.resize(srcMat1, concatMat, concatMat.size(), 1 / concat, 1 / concat, 0); // 先缩小，便有显示 List<Mat> matList = new ArrayList<>(); for (int i = 0; i < concat; i++) { matList.add(concatMat); } Mat mat = new Mat(); if (0 == forwad) { Core.hconcat(matList, mat); // 再拼接 } else { Core.vconcat(matList, mat); } setIcon(mat); } private void borderPic() { if (isBorder) { int rows = srcMat1.rows(); int cols = srcMat1.cols(); float top = border * rows; float bottom = border * rows; float left = border * cols; float right = border * cols; Mat dstMat = new Mat(rows, cols, srcMat1.type()); Core.copyMakeBorder(srcMat1, dstMat, (int) top, (int) bottom, (int) left, (int) right, 2); // 边框样式： //BORDER_CONSTANT = 0, 黑色 //BORDER_REPLICATE = 1, 边线拖放 //BORDER_REFLECT = 2, 从边线向外镜面反射 //BORDER_WRAP = 3, 上下左右互换 setIcon(dstMat); } else { setIcon(srcMat1); } } private void compPic(boolean comp) { if (comp) { Mat tmpMat = srcMat1.clone(); Rect roi = new Rect(150, 50, 90, 62); Mat dstMat = tmpMat.submat(roi); // submat方法按roi的区域从tmpMat拷贝了一块图片。这里用于放上新图片 Mat mask = srcMat3; // mask图片的纯黑部分会透明化处理。png格式优于jpg格式。 srcMat3.copyTo(dstMat, mask); // 将srcMat2放到dstMat上。遮罩使用srcMat2 setIcon(tmpMat); } else { setIcon(srcMat1); } } private void irregularPic(boolean irregular) { if (!irregular) { setIcon(srcMat1); return; } Mat maskMat = new Mat(); Imgproc.cvtColor(srcMat3, maskMat, Imgproc.COLOR_BGR2GRAY); // 将小图片转为灰阶图 Imgproc.threshold(maskMat, maskMat, 230, 255, Imgproc.THRESH_BINARY_INV); // 调整灰阶图，原始图纯白的变为纯黑的，其它像素转为纯白 List<Mat> planes = new ArrayList<Mat>(); Core.split(srcMat3, planes); // 拆分小图原始数据的BGR通道 Mat result1 = new Mat(); Mat result2 = new Mat(); Mat result3 = new Mat(); Core.bitwise_and(planes.get(0), maskMat, result1); // 和灰阶图进行逻辑与运算，使白色部分透明 Core.bitwise_and(planes.get(1), maskMat, result2); Core.bitwise_and(planes.get(2), maskMat, result3); List<Mat> result = new ArrayList<Mat>(); result.add(result1); result.add(result2); result.add(result3); Mat transparentMat = new Mat(); Core.merge(result, transparentMat); // 合并通道，得到白色變为透明的图片 Mat tmpMat = srcMat1.clone(); Rect roi = new Rect(50, 50, 90, 62); // 大图的一块区域 Mat destinationROI = tmpMat.submat(roi); // 大图上指定区域的子图 transparentMat.copyTo(destinationROI, transparentMat); // 再把小图copy到大图。指定了mask则进行透明处理。jpg和png效果相同 setIcon(tmpMat); } private void setIcon(Mat mat) { BufferedImage image = CVUtil.matToBufferedImage(mat); // CVUtil 见 http://www.gaohaiyan.com/3229.html imageView.setIcon(new ImageIcon(image)); } } |
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声明
本文由崔维友 威格灵 cuiweiyou vigiles cuiweiyou 原创，转载请注明出处：http://www.gaohaiyan.com/3244.html
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